Bicycle-lock.



L. P. CONWAY.

BICYCLE LOCK.

APPLICATION FILED SEPT. l l, I915- 1,"21 6,660. v Patnted Feb. 20,1917.

' 9 WITNESSES:

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LOUIS P. CONWAY, OF SAWTELLE, CALIFORNIA.

BICYCLE-LOCK.

Specification of Letters Patent.

. Patenterl'Feb. 20, 1917.

Application filed September 11,1915. .Seria1No.50,131.

To all whom it may concern:

Be it known that I, LOUIS P. CONWAY, a citizen of the United States, residing at Sawtelle, in the county of Los Angeles and State of California, new and useful Improvements in Bicycle- Locks, of which the following is a specification.

The lock which is the subject matter of the present application for patent is designed for attachment to bicycles for the purpose of preventing the theft or unauthorized use thereof.

It is the object of thepresent invention to provide a lock of-the kind stated which can be permanently attached to the frame of the bicycle, so-that it is always ready for use, and need not be carried in the pocket of the rider, and, furthermore, to provide a lock which cannot be easily picked, and which can be readily and quickly locked and unlocked to secure and release the bicycle.

These objects are attained by. means of anovel combination and arrangement of parts to be hereinafter described and claimed, referencebeing had to the accompanying drawing, in which Figure 1 is a side elevation of a fragment of a bicycle equipped with the lock.

Fig. 2 is a front elevation thereof.

Fig. 3 front of the casing being shown broken away.

Fig. 4 is a vertical section H of Fig. 3.

In the drawing, 10 denotes the casing of the lock to the back of which is riveted or otherwise secured a clamping jaw 11, cooperating with a second clamping jaw 12 for securing the lock to the bicycle. The jaws are curved so that they may embrace the rear fork 13 of the bicycle. From the ends of the jaws project ears 14 to receive clamping bolts 15 for drawing the jaws together to clamp the fork stem. The casing will be so located-on'the fork stem that the shackles 16 of the lock may be snapped around the rim of the rear wheel 17 of the bicycle, as shown in Figs. 1 and 2.

The shackles 16 are two crossed and pivotally connected members which project from the lock casing 10 a suflicient distance, so that they may be placed around the Wheel on the line have invented certain is an elevation of the lock, the

inner ends of the shackles are formed with lugs 19 for engagement by opposite tumblers 20 and 21, respectively, whereby the shackles are held closed as will be presently described. A spring 22, anchored between the inner ends of theshackles and engageable therewith, tends to swing the shackles open when they are released.

A seriesof four tumblers is provided for each shackle 16. The tumblers 20 engage the lugs of one shackle, and the tumblers 21 the lugs of the other shackle. The tumblers 20 are pivoted on a pin 23 and have a bottom recess or notch 24 to receive the lug. of the shackle. The tumblers 21 have a bottom recess or notch 25 to receive the lug of the other shackle. The two sets of tumblers are so arranged that when they engage the shackles, the latter are prevented from spreading or opening to release the wheel 17. The free ends of the tumblers 21 rest on the corresponding ends of the tumblers 20 when in looking position, and springs 26, engageable with the tumblers, hold the same in this position. The contiguous portions of the tumblers are beveled.

In the front of the casing 10 is a keyhole 27 for the key 28 whereby the shackles are unlocked. The keyhole is so located that the key, when it is inserted, has its bit 29 located between the inner ends of the shackles 16 and below the free ends of the tumblers 20 and 21. Thus, when the key is turned, its bit will strike the tumblers 20 and lift the same, and as the tumblers 21 rest on the tumblers 20, both sets of tumblers are swung to release the shackles, whereupon they are swung open by the spring 22. To lock the wheel 17, it is necessary only to press the shackles together until they are locked by the tumblers, the springs 26 snapping the same into locking position.

The tumblers 20 and 21 will diifer in certain dimensions as shown by dotted lines in Fig. 3 so that a large number of locks may be produced, each having a different key, the bit of which will be formed to correspond to the dimensions of the tumblers. The number of tumblers in the respective sets may also be varied. V

I claim: 7

A look comprising a casing, a pair of shackles pivoted in the casing and projecting therefrom, the inner ends of the shackles having lugs, opposite pivoted tumblers in the casing extending across the inner ends of the shackles, said'tumblers having edge recesses facing said ends of the shackles and adapted to receive the lugs of the respective shackles, and one of the tumblers having its free end resting on the cor- Gopies of this patent may be obtained for five can responding end of the other tumbler, a spring mounted between the inner ends of the shackles and engageable therewith to spread their outer ends, and a key engageable with the last-mentioned tumbler to swing the same and the other tumbler on their pivots.

In testimony whereof I afiiX my sigma ture in presence of two witnesses.

LOUIS P. CONWAY.

Witnesses: I

J. B. Mior-mnLs, MALYSA M. BAVNY.

ts each, by addressing the Commissioner of latents,

Washington, D. 0. 

